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NI 9214 and TB-9214 Datasheet - National Instruments

DATASHEETNI 9214 and TB-921416 TC, 78 mV, 24 Bit, 68 S/s Aggregate, Isothermal Terminal Block Isothermal terminal block for measurement accuracy up C 50 Hz/60 Hz noise rejection Up to C measurement sensitivity 250 Vrms, CAT II, channel -to-earth isolationThe NI 9214 is a high-density thermocouple module for CompactDAQ and CompactRIOsystems. Designed for use in higher- channel -count systems that also need high accuracy, theNI 9214 increases overall accuracy with a front-mount terminal block ( TB-9214 ), several CJCsensors in the terminal block, and a component layout that minimizes thermal ContentsAccessories NI 9214 NI TB-9214 Isothermal Terminal Block NI 9214 Getting Started Guide Spare NI TB-9214 Isothermal Terminal Block NI 9213NI 9214* For a J type thermocouple at 100 C using high-resolution mode when S/s/chScrew TerminalSpring TerminalIsothermalTerminal BlockIsothermalTerminal Block250 VrmsCh-Earth250 VrmsCh-Ch250 VrmsCh-Earth250 VrmsCh-Earth14 S/s68 S/sIsolationContinuousConnectivitySample RateSoftwareSelectableOTD Autozero ProductNameNI 9211NI 9212 ChannelsMaximumAccuracy*( C)

Input Impedance Each channel has a resistor that produces an input impedance between the TC and COM terminals. The gain and offset errors resulting from the source impedance of connected

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Transcription of NI 9214 and TB-9214 Datasheet - National Instruments

1 DATASHEETNI 9214 and TB-921416 TC, 78 mV, 24 Bit, 68 S/s Aggregate, Isothermal Terminal Block Isothermal terminal block for measurement accuracy up C 50 Hz/60 Hz noise rejection Up to C measurement sensitivity 250 Vrms, CAT II, channel -to-earth isolationThe NI 9214 is a high-density thermocouple module for CompactDAQ and CompactRIOsystems. Designed for use in higher- channel -count systems that also need high accuracy, theNI 9214 increases overall accuracy with a front-mount terminal block ( TB-9214 ), several CJCsensors in the terminal block, and a component layout that minimizes thermal ContentsAccessories NI 9214 NI TB-9214 Isothermal Terminal Block NI 9214 Getting Started Guide Spare NI TB-9214 Isothermal Terminal Block NI 9213NI 9214* For a J type thermocouple at 100 C using high-resolution mode when S/s/chScrew TerminalSpring TerminalIsothermalTerminal BlockIsothermalTerminal Block250 VrmsCh-Earth250 VrmsCh-Ch250 VrmsCh-Earth250 VrmsCh-Earth14 S/s68 S/sIsolationContinuousConnectivitySample RateSoftwareSelectableOTD Autozero ProductNameNI 9211NI 9212 ChannelsMaximumAccuracy*( C)

2 C SERIES THERMOCOUPLE MODULE COMPARISONNI C Series OverviewNI provides more than 100 C Series modules for measurement, control, and communicationapplications. C Series modules can connect to any sensor or bus and allow for high-accuracymeasurements that meet the demands of advanced data acquisition and control applications. Measurement-specific signal conditioning that connects to an array of sensors and signals Isolation options such as bank-to-bank, channel -to- channel , and channel -to-earth ground -40 C to 70 C temperature range to meet a variety of application and environmentalneeds Hot-swappableThe majority of C Series modules are supported in both CompactRIO and CompactDAQplatforms and you can move modules from one platform to the other with no | | NI 9214 and TB-9214 DatasheetCompactRIOC ompactRIO combines an open-embedded architecturewith small size, extreme ruggedness, and C Seriesmodules in a platform powered by the NI LabVIEW reconfigurable I/O (RIO) architecture.

3 Each systemcontains an FPGA for custom timing, triggering, andprocessing with a wide array of available modular I/O tomeet any embedded application is a portable, rugged data acquisition platformthat integrates connectivity, data acquisition, and signalconditioning into modular I/O for directly interfacing to anysensor or signal. Using CompactDAQ with LabVIEW, youcan easily customize how you acquire, analyze, visualize,and manage your measurement Professional Development System for Windows Use advanced software tools for large project development Generate code automatically using DAQ Assistant and InstrumentI/O Assistant Use advanced measurement analysis and digital signal processing Take advantage of open connectivity with DLLs, ActiveX,and .NET objects Build DLLs, executables, and MSI installersNI LabVIEW FPGA Module Design FPGA applications for NI RIO hardware Program with the same graphical environment used for desktop andreal-time applications Execute control algorithms with loop rates up to 300 MHz Implement custom timing and triggering logic, digital protocols, andDSP algorithms Incorporate existing HDL code and third-party IP including Xilinx IPgenerator functions Purchase as part of the LabVIEW Embedded Control and MonitoringSuiteNI 9214 and TB-9214 Datasheet | National Instruments | 3NI LabVIEW Real-Time Module Design deterministic real-time applications with LabVIEW graphical programming Download to dedicated NI or third-party hardware for reliableexecution and a wide selection of I/O Take advantage of built-in PID control, signal processing.

4 Andanalysis functions Automatically take advantage of multicore CPUs or setprocessor affinity manually Take advantage of real-time OS, development and debuggingsupport, and board support Purchase individually or as part of a LabVIEW suiteNI 9214 CircuitryTC+TC COMNI 9214 InputImpedance10 M 10 M OpenThermocoupleDetectionCurrent FilteredDifferentialAmplifierandMultiple xerIsolatedADC Each channel passes through a differential filer and a multiplexer before being sampledby a 24-bit ADC. The channels share a common ground, COM, that is isolated from other modules in VoltageThe NI 9214 common-mode range is the maximum voltage between any channel and COM. IfCOM is left floating, the internal common-mode voltage of the input circuitry is the average ofall the inputs. The NI 9214 measures the common-mode voltage level of each channel andreturns a warning in the software if the signal is outside the common-mode voltage Thermocouple DetectionEach channel has an open thermocouple detection (OTD) circuit, which consists of a currentsource between the TC+ and TC- terminals.

5 If an open thermocouple is connected to thechannel, the current source forces a full-scale voltage across the | | NI 9214 and TB-9214 DatasheetInput ImpedanceEach channel has a resistor that produces an input impedance between the TC and COMterminals. The gain and offset errors resulting from the source impedance of connectedthermocouples are negligible for most applications. Thermocouples with a higher leadresistance can introduce more significant ModesThe NI 9214 supports high-resolution and high-speed timing modes. High-resolution timingmode optimizes accuracy and noise and rejects power line frequencies. High-speed timingmode optimizes sample rate and signal Measurement AccuracyThermocouple measurement errors depend partly on the following factors: Type of thermocouple Accuracy of the thermocouple Temperature that you are measuring Resistance of the thermocouple wires Cold-junction temperatureFor the best accuracy performance, follow these guidelines: Set up the NI 9214 according to the getting started guide on to minimizethermal gradients across the NI 9214 terminals.

6 Null the lead-wire resistance to compensate for offset errors. Use the autozero channel to compensate for offset AccuracyHeat dissipated by adjacent C Series modules or nearby heat sources can cause errors inthermocouple measurements by heating the NI 9214 terminals to a different temperature thanthe cold-junction compensation sensor. Thermal gradient across the terminals can cause theterminals of different NI 9214 channels to be at different temperatures, which creates accuracyerrors and affects the relative accuracy between temperature measurement accuracy specifications include errors caused by the thermalgradient across the NI 9214 terminals for configurations with the NI 9214 terminals facingforward or ChannelThe NI 9214 has an internal autozero channel , which can be subtracted from eachthermocouple reading to compensate for offset errors. Use of the autozero channel is optional,however the NI 9214 specifications assume that autozero is applied to every sample.

7 Refer tothe documentation for the software that you are using with the NI 9214 for information aboutusing the autozero 9214 and TB-9214 Datasheet | National Instruments | 5NI 9214 SpecificationsThe following specifications are typical for the range -40 C to 70 C unless otherwise specifications are for the NI 9214 used in conjunction with an Do not operate the NI 9214 in a manner not specified in this misuse can result in a hazard. You can compromise the safety protectionbuilt into the product if the product is damaged in any way. If the product isdamaged, return it to NI for time115 minutesInput CharacteristicsNumber of channelsNI 921416 thermocouple channels, 1 internal autozerochannelTB-92143 internal cold-junction compensation channelsADC resolution24 bitsType of ADCD elta-SigmaSampling modeScannedVoltage measurement range mVTemperature measurement rangesWorks over temperature ranges defined byNIST (J, K, T, E, N, B, R, S thermocoupletypes)Timing ModeConversion Time (Per channel )Sample Rate2 (All Channels3) High-resolution52 S/sHigh-speed735 s68 S/sCommon-mode voltage rangeChannel-to-COM V minimumCOM-to-earth ground 250 V1 The warm-up time assumes the module is not in sleep mode, is facing forward or upward, and is ina constant ambient temperature.

8 NI recommends allowing the full warm-up you are using fewer than all channels, the sample rate might be faster. The maximum samplerate = 1/(Conversion Time x Number of Channels), or 100 S/s, whichever is faster than the maximum sample rate may result in the degradation of the autozero and cold-junction compensation | | NI 9214 and TB-9214 DatasheetCommon-mode rejection ratioHigh-resolution mode (at DC and 50 Hz to 60 Hz) channel -to-COM100 dBCOM-to-earth ground170 dBHigh-speed mode (at 0 Hz to 60 Hz) channel -to-COM70 dBCOM-to-earth ground120 dBThermocouple signal input bandwidthHigh-resolution HzHigh-speed mode80 HzOpen thermocouple settling time whenswitching OTD on/off6 sHigh-resolution noise rejection (at 50 Hzand 6 Hz)65 dBOvervoltage proection 30 V between any two inputsDifferential input impedance20 M input noiseHigh-resolution modeRMS220 nVrmsCrest factor6 High-speed VrmsCrest factor10 Gain errorHigh-resolution typical at 25 C, maximum at-40 C to 70 CHigh-speed typical at 25 C, maximum at-40 C to 70 COffset errorHigh-resolution mode2 V typical, 8 V maximumHigh-speed mode15 V typical, 23 V maximumOffset error from source impedance withOTD enabledAdd V per NI 9214 and TB-9214 Datasheet | National Instruments | 7 input currentOTD enabled200 nAOTD disabled400 pAOTD bias current drift200 pA/ C maximumCold-junction compensation accuracy423 5 C typical-20 C to 70 C maximum-40 C to 70 C maximumTemperature Measurement AccuracyMeasurement sensitivity5 High-resolution modeTypes J, K, T, E, CTypes R, CType CHigh-speed modeTypes J, K, T, CType CTypes R.

9 CType CThe following thermocouple measurement tables and graphs show the module accuracy foreach thermocouple type under the following conditions: Autozero is enabled. Open thermocouple detection is disabled. 0 V common-mode tables include all measurement errors of the module and terminal block including RMSnoise. The tables do not include the accuracy of the thermocouple compensation accuracy assumes that the thermocouple wires are mm2(24 AWG) or sensitivity represents the smallest change in temperature that a sensor can detect. It isa function of noise. The values assume the median of the full measurement range of the standardthermocouple sensor according to NIST Monograph | | NI 9214 and TB-9214 DatasheetTable 1. Thermocouple Type J/N Measurement Accuracy ( C)TemperatureHigh-ResolutionHigh-SpeedTy picalMaximumTypicalMaximum23 C 5 C-20 C to70 C-40 C to70 C23 C 5 C-20 C to70 C-40 C to70 C -100 2.

10 Thermocouple Type K Measurement Accuracy ( C)TemperatureHigh-ResolutionHigh-SpeedTy picalMaximumTypicalMaximum23 C 5 C-20 C to70 C-40 C to70 C23 C 5 C-20 C to70 C-40 C to70 C -100 9214 and TB-9214 Datasheet | National Instruments | 9 Table 3. Thermocouple Type T/E Measurement Accuracy ( C)TemperatureHigh-ResolutionHigh-SpeedTy picalMaximumTypicalMaximum23 C 5 C-20 C to70 C-40 C to70 C23 C 5 C-20 C to70 C-40 C to70 C -100 4. Thermocouple Type R/S Measurement Accuracy ( C)TemperatureHigh-ResolutionHigh-SpeedTy picalMaximumTypicalMaximum23 C 5 C-20 C to70 C-40 C to70 C23 C 5 C-20 C to70 C-40 C to70 C 0 | | NI 9214 and TB-9214 DatasheetTable 5. Thermocouple Type B Measurement Accuracy ( C)TemperatureHigh-ResolutionHigh-SpeedTy picalMaximumTypicalMaximum23 C 5 C-20 C to70 C-40 C to70 C23 C 5 C-20 C to70 C-40 C to70 C 0 C 100 C 300 1.


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